a. The mean of a random sample of 25 observations from a normal population with a standard

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a. The mean of a random sample of 25 observations from a normal population with a standard deviation of 50 is 200. Estimate the population mean with 95% confidence.

b. Repeat part (a) changing the population standard deviation to 25.

c. Repeat part (a) changing the population standard deviation to 10.

d. Describe what happens to the confidence interval estimate when the standard deviation is decreased.

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Statistics For Management And Economics Abbreviated

ISBN: 9781285869643

10th Edition

Authors: Gerald Keller

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Question Posted: Feb 03, 2015 08:49 AM

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a. The mean of a random sample of 25 observations from a normal population with a standard

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a 200 19650 200 1960 LCL 18040 UCL ...View the full answer

Statistics For Management And Economics Abbreviated

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